Cai Jiandong, Mineart Kenneth P, Li Xiaoyu, Spontak Richard J, Manners Ian, Qiu Huibin
School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.
Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China.
ACS Macro Lett. 2018 Aug 21;7(8):1040-1045. doi: 10.1021/acsmacrolett.8b00445. Epub 2018 Aug 10.
Materials with controlled porosity play a prominent role in industrial and domestic applications. Although a rich array of methods has been developed to tune the pore size over a broad range (from <1 nm to >1 μm), the fabrication of functional materials with a fully open porous structure with sub-100 nm pore size has remained a significant challenge. Herein, we report the hierarchical assembly of block copolymer toroidal micelles with an intrinsic cavity into multidimensional nanoporous superstructures (pore size 85-90 nm) by modulation of interparticle interactions. The toroids aggregate into oligo-supermicelles or 2D hexagonal arrays through van der Waals interactions upon drying on a substrate, while synergistic hydrogen bonding interactions further promote the formation of 3D nanoporous superstructures directly in solution. Thus, toroidal micelles can be manipulated as a type of distinctive building block to construct nanoporous materials.
具有可控孔隙率的材料在工业和家庭应用中发挥着重要作用。尽管已经开发出了一系列丰富的方法来在很宽的范围内调节孔径（从小于1纳米到大于1微米），但制备具有小于100纳米孔径的完全开放多孔结构的功能材料仍然是一项重大挑战。在此，我们报道了通过调节粒子间相互作用，将具有固有空腔的嵌段共聚物环形胶束分级组装成多维纳米多孔超结构（孔径85 - 90纳米）。在基底上干燥时，这些环通过范德华相互作用聚集成低聚超胶束或二维六边形阵列，而协同氢键相互作用进一步促进了直接在溶液中形成三维纳米多孔超结构。因此，环形胶束可以作为一种独特的构建单元来制备纳米多孔材料。
